Not all brakes nor ranges are designed the same, so there's no surprise that folks' experiences and conclusions are different.
Keeping things focused on the OP and his wife... here's what I can offer.
Our club has overheads but no rear or side walls. Here are two of my rifles. Both are 16in carbine gas system. One bare muzzle and the other with a Lantac. My wife is about 5'2'' and 135lbs. She's not a shooter (so forgive her style) but I drag her out to the range once or twice a year and she goes along to humor me.
Ammo - M193
Hearing protection - Foam plugs + Howard Leight Sport Electronic
From the shooting position the difference is that the bare muzzle has a deeper tone than the Lantac but there is little difference in perceived noise level, discomfort or pressure between the bare muzzle and using a brake. From about six feet to the side it's about the same difference though there is a light breeze felt on the face with each shot.
See the difference in muzzle rise, rifle movement and her being pushed around. Her unsolicited words...
The one with the muzzle thingie is a lot nicer to shoot.
RobinBareMuzzle - YouTube
RobinLantac - YouTube